HELP ME..regd the IWCONFIG for SHARED KEY :-(

.HELP ME ..please ..i am using a NETGEAR AP and ubuntu EDGY..i made the case 1 (mentioned below... work for me ..) and have a 3gcomm (chipset zd1211 ) working as a client .(it supports WPA2 -psk , and WPA-PSK in windows )

i am trying to associate my dongle/client to the netgear AP, for the various security features like wep.wep psk etc..in LINUX UBUNTU .!!


case 1: if AP is in Open /WEP /64 bits(made it work the follwing way)
ifconfig wlan0 up
iwconfig wlan0 mode managed key <enter the key here 10 digits for WEP 64 )
iwconfig wlan0 ESSID QENV
ifconfig wlan0 <ip of dongle> netmask <my netmask>
route add default gw < ip of gw >
ping to AP's IP


case 2 : if AP is in WEP/shared/64
please tell how to use iwconfig command for shared keys !!!


case 3 : if AP is in WPA-PSK and Encryption type is TKIP
and i enter a passphrase say "ILOVELINUX"

how do i use the iwconfig command for these options..
man pages says PASSPHRASE is not supported..how do i enter the passphrase.


case 4 if AP is in WPA2-PSK and Encryption type is AES
and i enter a passphrase say "ILOVELINUX"

how to make those case 2/3/4 work in linux for my client which has support for TKIP and AES as well.
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i am using in the netgear AP ..which support WPA-PSK(TKIP) and WPA2-PSK (AES)..finally if some things like a supplicant or nmay be if i need to setup a raduis server also etc..etc for WPA2 PSK has to be installed in LINUX ...pease guide me for the same.
PLEASE HELP I AM NEW TO LINUX ...THANKS A LOT FOR YOUR TIME !!